D/antiD Dark Energy in String Warped Compactification

TL;DR

This paper investigates the evolution and decay of relic D3-branes in string warped compactification, highlighting their role in transitioning from de Sitter to anti-de Sitter vacua and their implications for the stability of the universe.

Contribution

It introduces a detailed analysis of D3-brane dynamics post-inflation, revealing a decay mechanism for dS vacua in string theory models.

Findings

D3-branes can be temporarily frozen during radiation/matter domination.

Late-time potential energy causes D3-branes to move towards d-branes.

Annihilation of D3/d-branes results in the disappearance of dS vacua.

Abstract

We study the evolution of relic D3-branes after the D3/\bd-brane inflation in string warped compactification. The motion of D3-branes can be frozen under certain condition during the radiation/matter domination. These D3-branes can not be released until the D3/\bd-branes potential energy becomes dominated at late time. Subsequently they will move towards to \bd-branes, which play the role of uplifting AdS minimum to dS minimum, near the apex of throats. The annihilation of D3/\bd-branes leads to the disappearance of dS vacua. This process may be regarded as a rapid decay channel of present dS vacua. We discuss the parameter spaces required by this process and calculate the decay time.